I am Bob Rohner president of the Rohner Group, LLC. We have created this web site for the purpose of discussing what is known about the Papp Engine and presenting some compelling video of its history, creation, and operation. My brother Tom as well as I were associates of Joseph Papp for years. All of the engines you see running in any of the videos were designed and built by us. I hope you enjoy your visit. Please feel free to ask questions.

What is the Papp Engine ?

The principle of the Papp engine is basic and simple: A hermetic telescoping gas chamber is filled with a relatively inexpensive, abundant, and harmless charge of inert gases. These gases are subjected to controlled electronic pulses and radiation effects to create a powerful expansion as yet not understood. Removal or reversal of the pulses causes a contraction leaving the gases ready to cycle again. During this cycle electrons are released in sufficient quantity to provide for the power requirements of the opposing cylinder. This cyclic energy release is also not completely understood.

What Can it do ?

The gases themselves are estimated to have a life cycle of up to 6,000 hours of operation time. Since the Papp engine is not aspirated it is capable of operating in any environment. The engine appears to be torque limited to around 800 ft-lbs in the tests irregardless of speed. At a 1000 rpm a two cylinder will generate approximately 150 HP. The real maximum has never been completely tested. In simpler terms, you fill up your car with a charge of inert gas, drive it eight hours a day for two years, and bring it in for another recharge. All this time you are releasing nothing into the atmosphere and taking nothing out.